Pith Number

pith:HPKELC3K

pith:2013:HPKELC3KUPWFRIB7PU5JHKGL2F

not attested not anchored not stored refs pending

Hybrid preconditioning for iterative diagonalization of ill-conditioned generalized eigenvalue problems in electronic structure calculations

John E. Pask, N. Sukumar, Yunfeng Cai, Zhaojun Bai

arxiv:1308.2445 v1 · 2013-08-12 · cond-mat.mtrl-sci · physics.comp-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HPKELC3KUPWFRIB7PU5JHKGL2F}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T03:16:07.378423Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3bd4458b6aa3ec58a03f7d3a93a8cbd14ce40daf02e15cdf82c357600323bd23

Aliases

arxiv: 1308.2445 · arxiv_version: 1308.2445v1 · doi: 10.48550/arxiv.1308.2445 · pith_short_12: HPKELC3KUPWF · pith_short_16: HPKELC3KUPWFRIB7 · pith_short_8: HPKELC3K

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/HPKELC3KUPWFRIB7PU5JHKGL2F \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 3bd4458b6aa3ec58a03f7d3a93a8cbd14ce40daf02e15cdf82c357600323bd23

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e5fffbdc7fc3015b0b2776e092347497b9c728be74ab227cfdd22ddd113259c2",
    "cross_cats_sorted": [
      "physics.comp-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.mtrl-sci",
    "submitted_at": "2013-08-12T01:49:26Z",
    "title_canon_sha256": "0e5d0c7c2c8487d1ed63cd14bda3979699e4d4e007fc1630917b94c0017dbd4d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.2445",
    "kind": "arxiv",
    "version": 1
  }
}